GRK Infra operates in the infrastructure sector. The company's core competence includes the implementation of various infrastructure projects, project management of large and small projects and extensive railway expertise. Customers include the state, municipalities and cities as well as the private sector. In addition to the parent company GRK Infra Oyj, the GRK Group includes companies in each country of operation: GRK Suomi Oy in Finland, GRK Eesti AS in Estonia and GRK Sverige AB in Sweden.